Malware designed to surreptitiously infect victims’ computer systems and mine cryptocurrency on behalf of hackers has been found in 11 code libraries on programming language manager RubyGems. Hackers exploited RubyGems – a package manager for the Ruby programming language that devs use to upload and distribute new versions of software – by downloading Ruby libraries, adding the malicious code, and re-uploading them under new names Decrypt reports.